Control device for low-pressure fluorescent lamp

Details Control device for low-pressure fluorescent lamp Control device for low-pressure fluorescent lamp

1997-01-15

2000-11-07

Shingleton, Michael B

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315DIG7, 315241R, 315244, H05B 3702

Patent

active

061441740

ABSTRACT:
To control low-pressure fluorescent lamps, there is provided a device comprising a first change-over switch circuit and a second change-over switch circuit, respectively including a first power transistor and a second power transistor. The first change-over switch circuit first of all measures the period of time when the second power transistor is on. Then, secondly, it turns the first power transistor on for a period equal to the period measured.

REFERENCES:
patent: 4429359 (1984-01-01), Anderson
patent: 4581562 (1986-04-01), Nilssen
patent: 4935672 (1990-06-01), Lammers et al.
patent: 5164637 (1992-11-01), Nilssen
patent: 5455758 (1995-10-01), Pelly
French Search Report from French Patent Application 96/00823, filed Jan. 19, 1996.

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